A man should not wear too many accessories for freedom should always reigns over restrictions. But smart accessories can be used to add another layer of personality to the outfit.
Depending on your style and age, there are different ways to add these little things to make you stand out from the crowd. For summer, instead of leaving your skin bare, wear bracelets and necklaces that can leave a statement of who you are. They should be simple but still significant enough that when you pass by someone, they notice there's something fresh about you. It might be the colorful watchstrap or the subdued and simple bracelets but it speaks volumes about the type of person you are.
You can browse some options for men's accessories here on Topman: http://goo.gl/Rxp0z Choose those that you think will best represent who you are. Good luck, my friends!